Electric socket.



P. BARR.

ELEOTBIO SOCKET.

run-non nun none, 191:.

1,057,320, Patented Mar. 25, 1913.

alll-lllnlllk W llll lllllliiil INVENTOR mill-HA mun-sum m'unm. u. c.

rmanmuc BARR, OF-NEW vorur, N. Y.

ELECTRIC SOCKET.-

' Specification Letters Patent; Patented Mar, 25, 1913. I

a lic tion filed November 9, 1912. Serial No. 730.303.

To qll it may concern;

Be it known that I, FREDERIC BARR, a

citizen of the United Statesof America, and.

residing at. NewYork, in the county t Kingsand ,Stateof New York, have mvented new and useful Improvements in.

Sockets, of'which the following is a specification.

- My invention will be found to relate to two features of such a construction, wh lyh lief d'evicel The object is to' provide'a construction whichnmay be made'an'd assembled economiof thebase and around which the cord is,

cally and which is strong and safe.-

' The base or insulating block of the keyless type is molded in one piece-and is so formed that it can be made by simple die action and the circuit terminals and lamp contacts may be readily attached and are fully insulated. The strain relief feature comprises a finger integral with a circuit terminal .member-and arched over the end twisted. "When twofs train relief fingers are provided, an insulating flange may extend from the end of the base between thefingers and the cords to com letely separate and insulate them from eae fother. 1

Figure 1, is a side view of a lamp socket embodyin my' invention the cap being raised. Fig. 2, is a vertical-section and side view, the cap beingomitted. Fig. 3, is a j plan view of the body of the shell and the insulating base. Fig. t, is'a vertical section,

on-the plane of the line X X of Fig. 3 looking in the direction of the/arrow.- Fig. 5, is a vertical section on the plane of the line Y Y of Fig. 3 looking in the direction of the arrow. Fig. 6, is a'perspective view of the insulating base. Fig. 7, is'a detail view of one ofthe circuit terminals before it is formed for use..- Fig.. 8, is a side 'view of a pull socket base wit-h the circuit terminals :Fig. 9, is a plan View of the same, Fig. 10, is a side view of asocket showing a single finger for the strain relief. Fig. 11, is a'side view of another form of myinvention.

The body 1 of the shell and the cap 2 are adapted to be telescopically connected for instance by means of a loop 3 and a tongue 4. The body of the shell is slitted at 5 and slotted at 6 to' form a spring or resilient portion? in which the loop-3 is located so keyless socket a'nda strain rethat the loop may be pressed inward to release it for rotatin parts. The insulating block or base 8 formed for instance of porcelain carries the screw lamp terminal 9. Fiber insulation 10 is interposed between the shell and the base. A' lug 11 integral with the b'ase proj'eets through the fiber and into the slot 6 in the and separating the shell to prevent the parts from-relatively. I

turning. To facilitate the interlocking. of

the base 8 with the shell 1, I may turn inwardly slightly the edges 12 of the shell ad jacent the slot (3 to embrace the sides of the lug 11. The fiber lining 10-is cut away at. 13 to permit compressionof the shell adjacent the latch member 3. The'base '3 has three recesses 14, 15f and 16 which open downwardly fromthe upper end of the base 'and have flanges 17, 18 and 19 respectively with perforations for the-passage-of screws.

A screw 20 passesupward through a flange 21 of the screw lamp terminal and through the flange 17 ofthe insulating base and screws into a nut 22. which"is located'in the I i bottom of the recess14 so that it cannot r0.-

tate'. The circuit terminal ,has an upright portion 23 adapted to fit in the back of the recess 16 and a foot .Madapted to beseated on the flange 19. A- screw 25 passes up through a flange of the screw lampv terminal rninal and its foot and the recess 16'1a're so and screws into the foot-24. The circuit tershaped that a singlescrew 25 suffices-to hold the terminal in position. The other circ'uit terminal 26 is similarly secured in the recess '1-5'by a screw 27. Theleenter lamp terminal has its base 23 secured by the screw 27 to the flange 18 and a. contact portion 29 adapted to be engaged by the-center lamp contact. The opposite end of the center lamp terminal 30 is retlexed beneath the contact portion 29 and adapted to press a ains' t the boss 31 on the bottom of the insu ating block S.- 'By this construction the terminal may be made of thin material but have' a very considerable resiliency.

The ends of the circuit terminals 23- 'and 20 are extended into the form of fingers .32 and 33 which project up over the end of the insulating block 8 leaving passages beneath them for the lamp cords 34 and 35. The

1 prevent the cord having two recesses each insulating base between the fingers 32 and I the bottoms of the recesses,

33 and their respective cords. .To wire the socket the cords are threaded through the cap 2 and each cord is threaded beneath one of the strain relief fingers 32- or 33 and around the base of the finger and has the bare end attached to the corresponding binding screw. I The cordszare then pulled taut and the sharp bends of the cord under and around the fingers and into the recesses and under the binding scgws will effectively 'being pulled out.

In the form sho'wii lr i 9 the circuit terminals 40 and 41 aief seenred to the insulatin base '42 by screws such as 43 and 44 and t ese circuit terminals have the integral strain relief fingers 45 and 46 to receive the cord or cords. This construction also ,shows'aflange 47 for separating the two finge rs 45 and 46 and the cords attached thereto; lnt'heform shown in Fig. 10 a single long finger 50 is provided-connected to one of the circuit terminals and about it both of the lamp cord members may be twisted. In the form shown in Fig. 11 the circuit terminal- 52 has a binding screw 53 and a strain relief finger 54 bent upward over the top of the insulating button or block 55. In all these forms of strain relief devices'it will be noted that very little is added to the cost of1 c0nst'ruction and nothing is added to the cost of-assembling the mechanism and the wiring of the socket as in fact it is more simple than the ordinary tieof a knot in the cord and is; more eflective.

Whileithe portion 7 of thejbody of the shell may be compressed to release the interlocking device, it will be noted that the lug 11 serves to prevent compression" of the cap adjacent the interlocking device and 'this facilitates the release of the catch when desired but does not impair the locking function.

What I claim is 1. In a lamp socket. a,n, insulating base 0' ning at the same end of the base and also 'gen at a side of the base and having perforated flanges at the bottoms of the recesses, a screw lamp terminal fitted to the opposite end of said base and having a flangebeneath one of said base flangesa center lamp terminalfitted to said base beneath theother flange of said base and circuit terminals-fitting in said recesses and having screw-threaded feet fitting over the perforations in the flanges of the insulating base and screws respectively. passing through said la-mp terminals and through said flanges of said insulating base and screwed into the feet of said circuit terminals.

Q. In a lamp socket, an insulating base having two recesses each open at the same end of the base and also open at a side of the base and having perforated flanges at terminal fitted to the opposite end of said base and having a flange beneath one of said base flanges, a center lamp terminal fitted to i shaped integral strain relief fingers extendrug. from said recesses over the end of said insulating base and leaving passages between said fingers and the .end of said base for the lampcords. I

In a lamp socket, an insulating base having twolrecesses each open at the same end of the base and alio en at a side of the base and having perfo ated flanges at the bottoms of the recesses: tfis'crew'lamp terminal fitted to the oppositeendiof said base and having a fia'nge beneatli one of'said base flanges, a center lamp terminal fitted to said base beneath the other flange of said base and circuit terminals fitting in said recesses and having screw-threaded feet fitting over the perforations in the flanges of the insulating base and screws respectively passing through said lamp terminals and through said flanges of said insulating base and screwed into the feet of said circuit terminals, said-circuit terminals having hooked-shaped integral strain relief fingers extending from said recesses over the end of said insulating base and leaving passages between said'finger's and the end of said base for the lamp cords, said insulating base having an integral insulating flange extending between said strain relieving fingers.

4. In a lamp socket, an insulating base having two recesses each opening at the same end of the base and also open at a side of the base and aving perforated flanges at the bottoms of the recesses, a screw lamp terminal fitted to the opposite end of said base and having a flange beneathone of said base flanges, a center lamp terminal fitted to said base beneath the other flange of said base and circuit terminals fitting in said recesses and having screw-threaded feet fitting over the perforations in the flanges of the insulating base and screws'respectively passing through said lamp terminals and through said flanges of said insulating base and screwed into the feet of said circuit terminals and said base having a third recess opening at the same end of said base with the first two mentioned recesses and also open at the side of said base and a perforated flange at the bottom of a screw lamp said third recess, a screw-threaded nutlo- 330 terminal and screwed into said nut.

5:As an article of manufacture, an insulating base for a .keyless lamp socket having two recesses open at the sides andat one end for receiving circuit terminals, said base having two flanges forming the bottoms of said recesses, said flanges having perforations for the passage of screws for securing the lamp terminals to the circuit terminals.

6. In a lamp socket, an insulating base, a circuit terminal secured in the side there of and having a hooked-shaped finger extending around the end of said base and leaving an opening between said finger and said base for the passage of a lamp cord and a binding screw at the side of said terminal located adjacent the base of said hook .for securing the end of said cord.

7. In a'lamp socket, an insulating base, having recesses in E ie sides, circuit terminals secured in said recesses, each of said terminals having a hook-like strain relieving member extending over the end of said base and leaving passages between said members and the end of said base for the circuit cords and binding screws extending into the sides of said circuit terminals within the periphery of said base.

8. In a lamp socket, an insulating base having recesses in the sides, circuit terminals secured in said recesses, each of said terminals having a. hook-like strain relieving member extending over the end of said base and leaving passages between said members and the end of said base for the circuit cords and binding screws extending into the sides of said circuit terminals within the periphery of'said base, and an insulating flange extending across the end of said base between said strain relieving members.

9, In a socket, a shell body having a slot in its upper end, a catch member in the edge adjacent said slot, an insulating base Within said body having a lug projecting into said slot for preventing the parts from relatively turning, a fiber lining between said base and said body having a part cut away to permit the catch member to be pressed inwardly and a. cap member telescoping outside of the upper end of said shell bodyand covering said lug and said slot. and having a catch member adapted to cooperate with the catch member on said shell body, said lug on said base member serving to prevent compression of said cap adjacent the catch members.

FREDERIC BARR.

Witnesses R. S. ALLYN, E. Bnaurono. 

